Re: [Sdcc-user] Problems compiling releases after 4562 in AMD64

[Borut R. <bor...@si...>]

It seems that I'm guilty for this one :-[ . I'll take a look.

P.S.: I really miss the Compile Farm builds ... :-(


Borut


Rodrigo Guerra wrote:
> Hi,
>
> I used DDD and found the segmentation fault to occur in line 121 of 
> the file dbuf_string.c which looks like this:
> (...)
> 120  case 's':
> 121    total_width += strlen (va_arg (ap, char *));
> 122    break;
> (...)
>
> In DDD the message shown at the botton is like this:
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000403617 in calc_result_length (format=0x5f78e8 ";Allocation 
> info for local variables in function '%s'\n", args=0x7fff5da66bb0) at 
> ../support/Util/dbuf_string.c:121
> (gdb)
>
> I will try to find out more later.
>
> Cheers,
> Guerra
>
> On 1/16/07, *Frieder Ferlemann* < fri...@we... 
> <mailto:fri...@we...>> wrote:
>
>     Hello Rodrigo,
>
>     Rodrigo Guerra schrieb:
>     > I am using an up-to-date Ubuntu Edgy (kernel 2.6.17-10) in an AMD64.
>
>     Probably not many SDCC developers have already switched
>     to 64 bit systems... So they might not be able to reproduce.
>
>     > The last error message I get looks like this:
>     > make[2]: Entering directory `/home/guerra/sdcc-svn/device/lib'
>     > mkdir -p build/ds390
>     > ../../bin/sdcc -I../../device/include
>     -I../../device/include/mcs51 -mds390
>     > --nostdinc --std-sdcc99 -c _autobaud.c -o build/ds390/_autobaud.rel
>     > Caught signal 11: SIGSEGV
>     > make[2]: *** [build/ds390/_autobaud.rel] Error 1
>
>     Something you could try to do to narrow things down is to
>     produce a core dump, which could then be examined by
>     a post-mortem debugger.
>
>     On that path would be:
>
>     - to enable core dumps on your system
>       (typically edit/outcomment a line in /etc/profile like
>        ulimit -c 30000 # only core-files less than 30 MB are written
>       and then newly log into your system)
>
>     - reproduce the SIGSEGV error
>
>     - search for the core dump. Depending on your systems settings
>       they may end up in home directory, the current directory or
>       the /tmp directory. (The core dump might be called "core",
>       "core.<process_ID>" or  "core.<date>".
>       Note also that your Unix system might be configured to
>       f.e. automatically delete core dumps after a week.)
>
>     - install a debugger like ddd
>
>     - open the core dump with ddd.
>       You should be able to see the source-line where the error
>       occurred and be able to examine the value of variables.
>       Then use "show call stack" or "dump stack trace"
>       or however it might be named to see from where the function
>       was called.
>       This information should/could be sufficient to fix the bug.
>
>
>     Greetings,
>
>     Frieder
>
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>
> -- 
> Rodrigo da Silva Guerra
> PhD Student
>
> Department of Adaptive Machine Systems
> Graduate School of Engineering
> Osaka University - Japan
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